<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>HTML5定位</title>
    <script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.7.2/jquery.min.js"></script>
    <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=wqBXfIN3HkpM1AHKWujjCdsi"></script>
    <script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>
    <style type="text/css">
        *{ margin: 0px; padding: 0px;}
        body{text-align: center;  height: 100%;overflow:hidden;}
        #allmap{ width: 100%;height: 100%; position: absolute;}
    </style>
</head>
<body>
<div id="allmap"></div>
<script type="text/javascript">
    $(function(){
        if(supportsGeoLocation()){
            alert("你的浏览器支持 GeoLocation.");
        }else{
            alert("不支持 GeoLocation.")
        }
        // 检测浏览器是否支持HTML5
        function supportsGeoLocation(){
            return !!navigator.geolocation;
        }
        // 单次位置请求执行的函数
        function getLocation(){
            navigator.geolocation.getCurrentPosition(mapIt,locationError);
        }
        //定位成功时，执行的函数
        function mapIt(position){
            var lon = position.coords.longitude;
            var lat = position.coords.latitude;
            // alert("您位置的经度是："+lon+" 纬度是："+lat);
            var map = new BMap.Map("allmap");
            var point = new BMap.Point(""+lon+"",""+lat+"");
            map.centerAndZoom(point,19);
            var gc = new BMap.Geocoder();
            translateCallback = function (point){
                var marker = new BMap.Marker(point);
                map.addOverlay(marker);
                map.setCenter(point);
                gc.getLocation(point, function(rs){
                    var addComp = rs.addressComponents;
                    if(addComp.province!==addComp.city){
                        var sContent =
                            "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你当前的位置是：</h4>" +
                            "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>"+addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +
                            "</div>";}
                    else{
                        var sContent =
                            "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你当前的位置是：</h4>" +
                            "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>"+ addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +
                            "</div>";
                    }
                    var infoWindow = new BMap.InfoWindow(sContent);
                    map.openInfoWindow(infoWindow,point);
                });
            }
            BMap.Convertor.translate(point,0,translateCallback);
        }
        // 定位失败时，执行的函数
        function locationError(error)
        {
            switch(error.code)
            {
                case error.PERMISSION_DENIED:
                    alert("User denied the request for Geolocation.");
                    break;
                case error.POSITION_UNAVAILABLE:
                    alert("Location information is unavailable.");
                    break;
                case error.TIMEOUT:
                    alert("The request to get user location timed out.");
                    break;
                case error.UNKNOWN_ERROR:
                    alert("An unknown error occurred.");
                    break;
            }
        }
        // 页面加载时执行getLocation函数
        window.onload = getLocation;
    })
</script>
</body>
</html>